Hollow stacking cube



FIG. 1 is a perspective view of a hollow stacking cube showing my new design in use;

FIG. 2 is a top outside view of a first half shell forming the hollow stacking cube, said first half shell seen as the lower shell in FIG. 1;

FIG. 3 is a bottom inside view of the first half shell;

FIG. 4 is a side view of the first half shell, all sides being identical;

FIG. 5 is a top outside view of a second half shell forming the hollow stacking cube, said second half shell seen as the upper shell in FIG. 1;

FIG. 6 is a bottom inside view of the second half shell; and,

FIG. 7 is a side view of the second half shell, all sides being identical.

The hollow stacking cube shown in broken lines in FIG. 1 shows the first and second half shells coupled together to form an assembled unit.

The hollow stacking cube shown in broken lines in FIG. 1 shows the first and second half shells coupled together to form an assembled unit that forms no part of the claimed design. 

CLAIM The ornamental design for a hollow stacking cube, as shown and described. 